vault backup: 2025-10-31 16:26:48

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2025-10-31 16:26:48 -04:00
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@@ -88,6 +88,8 @@ are in contradiction to this idea.
Given a minimum ampacity, find all valid configurations.
[[nfpa-70_310_conductors_for_general_wiring]]
> [!cite] NEC Article 310 (emphasis added)
> #### 310.10(H) Conductors in Parallel.
> ##### (1) General.
@@ -162,31 +164,31 @@ $$
> [!info] 3-Phase Voltage
>
> $$
> V_{LL} = \sqrt{3} \times V_{LN}, \quad V_{LN} = \frac{V_{LL}}{\sqrt{3}}
> V_{L} = \sqrt{3} \times V_{P}, \quad V_{P} = \frac{V_{L}}{\sqrt{3}}
> $$
3% allowable voltage drop for a 120V line-to-neutral load:
$$
\text{Max} \Delta V = 0.03 \times 120 \text{V}_{LN} = 3.6 \text{V}_{LN}
\text{Max} \Delta V = 0.03 \times 120 \text{V}_{P} = 3.6 \text{V}_{P}
$$
3% allowable voltage drop for a 208V line-to-line load:
$$
\text{Max} \Delta V = 0.03 \times 208 \text{V}_{LL} = 6.24 \text{V}_{LL}
\text{Max} \Delta V = 0.03 \times 208 \text{V}_{L} = 6.24 \text{V}_{L}
$$
#### Line to Neutral Loads
$$
\Delta V_{LN} = I \times Z \times 2L
\Delta V_{P} = I \times Z \times 2L
$$
#### Line to Line Loads
$$
\Delta V_{LL} = \sqrt{3} \times \left( I \times Z \times 2L \right)
\Delta V_{L} = \sqrt{3} \times \left( I \times Z \times 2L \right)
$$
#### 3-Phase Loads